Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets - current	$ 233,442	$ 4,131
Derivative assets - noncurrent	10,963	2,750
Liabilities:
Commodity derivative liabilities – current	(103,092)	(23,450)
Commodity derivative liabilities – noncurrent	(10,689)	(3,385)
Fair Value, Measurements, Recurring | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets - current	40
Derivative assets - noncurrent	0
Liabilities:
Commodity derivative liabilities – current	(2,890)
Commodity derivative liabilities – noncurrent	(3,900)
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets - current	0
Derivative assets - noncurrent	0
Liabilities:
Commodity derivative liabilities – current	0
Commodity derivative liabilities – noncurrent	0
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets - current	40
Derivative assets - noncurrent	0
Liabilities:
Commodity derivative liabilities – current	(2,890)
Commodity derivative liabilities – noncurrent	(3,900)
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets - current	0
Derivative assets - noncurrent	0
Liabilities:
Commodity derivative liabilities – current	0
Commodity derivative liabilities – noncurrent	0
Fair Value, Measurements, Recurring | Commodity contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets - current	233,402	4,131
Derivative assets - noncurrent	10,963	2,750
Liabilities:
Commodity derivative liabilities – current	(100,202)	23,450
Commodity derivative liabilities – noncurrent	(6,789)	(3,385)
Fair Value, Measurements, Recurring | Commodity contracts | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets - current	0	0
Derivative assets - noncurrent	0	0
Liabilities:
Commodity derivative liabilities – current	0	0
Commodity derivative liabilities – noncurrent	0	0
Fair Value, Measurements, Recurring | Commodity contracts | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets - current	233,402	4,131
Derivative assets - noncurrent	10,963	2,750
Liabilities:
Commodity derivative liabilities – current	(100,202)	23,450
Commodity derivative liabilities – noncurrent	(6,789)	(3,385)
Fair Value, Measurements, Recurring | Commodity contracts | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets - current	0	0
Derivative assets - noncurrent	0	0
Liabilities:
Commodity derivative liabilities – current	0	0
Commodity derivative liabilities – noncurrent	$ 0	$ 0
Crude Oil | Commodity contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Third-party quoted forward prices	NYMEX WTI
MEH [Domain] | Commodity contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Third-party quoted forward prices	MEH
Natural Gas [Member] | Commodity contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Third-party quoted forward prices	NYMEX HH